Get up, feed kids and send them to school.
Go to work day shift cooking in school cafetaria.
Finish work, take kids to grandma's house.
Go work evening shift at convenience store.
Get kids, go home (or pass out at grandma's).
Repeat.

I have known one or two like that.

Meanwhile, please prove a correlation between mandatory training and reductions in accidents by gun owners, or between mandatory training and successful defensive gun uses.

If you can't, then how can you possibly justify infringing on the rights of others because you just think you should?